My wife is great photographer (www.theinquisitiveeye.com), and I have created a few slideshows over the years.We are thinking about "maybe" trying to construct a website, offering photobooks and slideshows.

One question I have... Can I use previous slideshows (ProShow Gold) on my site directly, or would I have to offer a link to their site? Hope that makes sense.

Take a look at the thread I've linked to below. This will allow you to display shows on your own web site, but have the PX files hosted on the Photodex servers. It may seem like a difficult process, but it's actually quite simple once you do it.